Asus has started rolling out official Android 6.0 Marshmallow update for Asus Zenfone Zoom model number ZX551ML.Previously Asus released official Marshmallow update for Zenfone Selfie and now Zenfone Zoom also received the update.The OTA Update comes with a software version / built number WW-4.21.40.74.The update is available via OTA (Over-the-air).You can manually check for the latest update available for your device.

If there is no update, then wait for the update to come to your region or you can manually Update Zenfone Zoom to Official Marshmallow Android 6.0 by flashing the Marshmallow OTA Update file on your device.If your device’s bootloader is unlocked or device is rooted then you won’t get the notification, you have to manually flash / install the android 6.0 marshmallow OTA Update on ASUS ZenFone Zoom.Here we will be sharing full step by step guide to Update Zenfone Zoom to Official Marshmallow Android 6.0

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